📄 ds1302.c
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#include <reg52.h> //头文件
#include <stdio.h>
#define uchar unsigned char //宏定义
sbit SCLK = P1^3; //声明接口引脚
sbit I_O = P1^4;
sbit RSTB = P1^5;
void ResetDS1302(); //复位函数声明
void InitDS1302(); // DS1302初始化函数声明
void WriteClkByte(); //时钟字节写入函数声明
void WriteRamByte(); // RAM字节写入函数声明
uchar ReadByteDS1302(); //字节读取函数声明
void WriteByteDS1302(uchar); //字节写入函数声明
void Display(uchar); //显示时钟寄存器内容函数声明
void BurstReadRAM(); //多字节突发方式读取RAM函数声明
void BurstWriteRAM(); //多字节突发方式写入RAM函数声明
void main (void) //主函数
{
uchar Key, Key1,Key2;
SCON = 0x50; //设置串行口: 方式 1, 8位UART, 允许接收
TMOD |= 0x20; //设置定时器T1, 方式 2, 8位自动重装
PCON =0x80; //设置SMOD=1
TL1 =0xF4; //波特率4800bit/s，初值
TH1 =0xF4;
TR1 = 1; //开启定时器1
TI = 1;
printf("***********AT89S52 CONTROL DS1302***********\n\n");
printf("Initialize the DS1302.\n");
InitDS1302(); //初始化DS1302
while (1)
{
printf("\nEnter DS1302 Menu Selection:");
printf("c or C: Run the Clock Routine\n");
printf("i or I: Initialize the DS1302\n");
printf("r or R: Run the RAM Routine\n");
Key = _getkey(); //获取输入字符
switch(Key)
{
case 'c': //执行时钟操作
case 'C':
printf("\rRun the Clock Routine\n");
Key1 = _getkey(); //获取输入字符
switch(Key1)
{
case 'd': //显示
case 'D':
Display(1);
break;
case 'w': //时钟字节写入
case 'W':
WriteClkByte();
break;
}
break;
case 'i': //初始化DS1302
case 'I':
InitDS1302();
break;
case 'r': //RAM操作
case 'R':
printf("\rRun the RAM Routine\n");
Key2 = _getkey(); //获取输入字符
switch(Key2)
{
case 'b': //RAM字节写入
case 'B':
WriteRamByte();
break;
case 'r': //多字节突发方式读取RAM
case 'R':
BurstReadRAM();
break;
case 'w': //多字节突发方式写入RAM
case 'W':
BurstWriteRAM();
break;
}
break;
}
}
}
void ResetDS1302()
{
SCLK = 0;
RSTB = 0;
RSTB = 1;
}
uchar ReadByteDS1302()
{
uchar i;
uchar RByte;
uchar TempByte;
RByte = 0x00;
I_O = 1;
for(i=0; i<8; ++i) //逐位读取字节数据
{
SCLK = 1; //时钟操作
SCLK = 0;
TempByte = (uchar)I_O;
TempByte <<= 7; //移位
RByte >>= 1;
RByte |= TempByte;
}
return RByte; //返回结果
}
void WriteByteDS1302(uchar W_Byte)
{
uchar i;
for(i = 0; i < 8; ++i) //循环逐位写入
{
I_O = 0;
if(W_Byte & 0x01) I_O = 1;
SCLK = 0; //时钟操作
SCLK = 1;
W_Byte >>= 1; //移位
}
}
void WriteClkByte()
{
uchar Address;
uchar Data;
printf("\nWrite Clock Function:");
printf("\nWrite Clock ADDRESS:");
scanf("%bu", &Address); //获取地址
printf("\nWrite Clock DATA:");
scanf("%bx", &Data); //获取数据
Address = ((Address * 2) | 0x80); //时钟数据写入命令
ResetDS1302(); //复位DS1302
WriteByteDS1302(Address); //写地址
WriteByteDS1302(Data); //写数据
ResetDS1302(); //复位DS1302
}
void WriteRamByte()
{
uchar Address;
uchar Data;
printf("\nWrite RAM Function:");
printf("\nWrite Ram ADDRESS (HEX):");
scanf("%bx", &Address); //获取RAM地址
printf("\nWrite Ram DATA (HEX):");
scanf("%bx", &Data); //获取RAM数据
Address = ((Address * 2) | 0xC0); //RAM数据写入命令
ResetDS1302(); //复位DS1302
WriteByteDS1302(Address); //写RAM地址
WriteByteDS1302(Data); //写RAM数据
ResetDS1302(); //复位DS1302
}
void Display(uchar loop)
{
uchar lsec = 99, sec, min, hrs, dte, mon, day, yr;
do //主循环
{
ResetDS1302();
WriteByteDS1302(0xBF); //以多字节方式读取时钟寄存器数据
sec = ReadByteDS1302(); //读取秒
min = ReadByteDS1302(); //读取分
hrs = ReadByteDS1302(); //读取小时
dte = ReadByteDS1302(); //读取日期
mon = ReadByteDS1302(); //读取月份
day = ReadByteDS1302(); //读取星期
yr = ReadByteDS1302(); //读取年
ResetDS1302(); //复位DS1302
if(sec != lsec || !loop) //每秒显示一次
{ //输出结果
printf("\nYr Day Mon Dte Hrs Min Sec");
printf("\n%2.bX %2.bX %2.bX %2.bX", yr, day, mon, dte);
printf(" %2.bX %2.bX %2.bX", hrs, min, sec);
lsec = sec;
}
if(!loop) break;
}while(!RI);
if(loop) _getkey();
}
void BurstReadRAM()
{
uchar DS1302RAM[31]; //RAM数组
uchar i;
ResetDS1302(); //复位DS1302
WriteByteDS1302(0xFF); //多字节方式读取RAM
for (i=0; i<31; ++i)
{
DS1302RAM[i] = ReadByteDS1302(); //保存数据到RAM数组
}
ResetDS1302(); //复位DS1302
printf("\nDS1302 RAM Data；"); //输出片内RAM的数据
printf("\n%2.bX %2.bX %2.bX %2.bX %2.bX %2.bX %2.bX %2.bX",
DS1302RAM[0], DS1302RAM[1], DS1302RAM[2], DS1302RAM[3],
DS1302RAM[4], DS1302RAM[5], DS1302RAM[6], DS1302RAM[7]);
printf("\n%2.bX %2.bX %2.bX %2.bX %2.bX %2.bX %2.bX %2.bX",
DS1302RAM[8], DS1302RAM[9], DS1302RAM[10], DS1302RAM[11],
DS1302RAM[12], DS1302RAM[13], DS1302RAM[14], DS1302RAM[15]);
printf("\n%2.bX %2.bX %2.bX %2.bX %2.bX %2.bX %2.bX %2.bX",
DS1302RAM[16], DS1302RAM[17], DS1302RAM[18], DS1302RAM[19],
DS1302RAM[20], DS1302RAM[21], DS1302RAM[22], DS1302RAM[23]);
printf("\n%2.bX %2.bX %2.bX %2.bX %2.bX %2.bX %2.bX",
DS1302RAM[24], DS1302RAM[25], DS1302RAM[26], DS1302RAM[27],
DS1302RAM[28], DS1302RAM[29], DS1302RAM[30]);
printf("\nEND RAM Data；");
}
void BurstWriteRAM()
{
uchar Data;
uchar i;
printf("\nWrite Ram DATA (HEX):");
scanf("%bx", &Data); //获取RAM数据
ResetDS1302(); //复位DS1302
WriteByteDS1302(0xfe); //多字节方式写入RAM
for (i=0; i<31; ++i) //循环写入
{
WriteByteDS1302(Data);
}
ResetDS1302(); //复位DS1302
}
void InitDS1302()
{
uchar year, month, date, day, hour, minute, second;
printf("\nEnter the Clock information: ");
printf("\nPlease Enter the year (0-99): "); //输入年
scanf("%bx", &year);
printf("\n Please Enter the month (1-12): "); //输入月
scanf("%bx", &month);
printf("\n Please Enter the date (1-31): "); //输入日
scanf("%bx", &date);
printf("\n Please Enter the day (1-7): "); //输入星期
scanf("%bx", &day);
printf("\n Please Enter the hour (1-24): "); //输入小时
scanf("%bx", &hour);
hour =hour & 0x3f; //设置时钟为24小时方式
printf("\n Please Enter the minute (0-59): "); //输入分钟
scanf("%bx", &minute);
printf("\n Please Enter the second (0-59): "); //输入秒
scanf("%bx", &second);
ResetDS1302(); //复位DS1302
WriteByteDS1302(0x8e); //写保护控制寄存器
WriteByteDS1302(0); //允许写入
ResetDS1302(); //复位DS1302
WriteByteDS1302(0x90); //涓流充电寄存器
WriteByteDS1302(0xab); //允许充电
ResetDS1302(); //复位DS1302
WriteByteDS1302(0xbe); //以多字节突发方式写入8个字节时钟数据
WriteByteDS1302(second); //写入秒
WriteByteDS1302(minute); //写入分钟
WriteByteDS1302(hour); //写入小时
WriteByteDS1302(date); //写入星期
WriteByteDS1302(month); //写入月
WriteByteDS1302(day); //写入日
WriteByteDS1302(year); //写入年
WriteByteDS1302(0); //对写保护控制寄存器写入0
ResetDS1302(); //复位DS1302
}
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